I've just released APRS Messenger v2.92 to the web page:
http://www.crosscountrywireless.net/aprs_messenger.htm
This program now has a "smart" Igating feature to send APRS messages and
Acks from the APRS-IS to HF stations using APRS over PSK, QPSK or GMSK.
The program only transmits packets to stations recently heard on HF by
the Igate. To reduce on-air traffic the first message packet isn't
usually transmitted to allow an Ack via the APRS-IS first if both
stations are connected to the APRS-IS.
Igated packets are transmitted using APRS over GMSK-250 which has been
found to be very resistant to fading, noise and interference.
This new feature allows HF stations in remote areas of the world to send
and receive APRS messages to any other APRS station worldwide.
The worldwide frequency for APRS over PSK, QPSK and GMSK is 10.1497 MHz.
73,
Chris, G4HYG
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Chris Moulding
Cross Country Wireless
7 Thirlmere Grove, Bolton, Lancs, BL4 0QB, UK
Tel/fax: +44(0)1204 410626
Mobile: +44(0)7752 391908
Website: http://www.crosscountrywireless.net